The grasshopper, praying mantis, cricket, katydid, locust and cockroach belong to this group of insects. Their mouth parts are specially designed for chewing with jaws that move back and forth rather than up and down. They have two pairs of wings. The front pair is long, narrow and stiff. The back wings are like cellophane with veins and are wider. The back wings fold up under the front wings when they are not in use.
In some of these insects such as the grasshopper, the rear legs are powerful and allow them to jump and spring forward. It also makes noises by rubbing its legs against its wing veins.
All insects in this group undergo incomplete metamorphosis. The grasshopper and cricket destroy crops but the praying mantis eats insects that are harmful to crops.
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